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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Ann Ouyang:

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Patient Reviews

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The overall average patient rating of Dr. Ann Ouyang is Excellent. Dr. Ouyang has been reviewed by 2 patients who have provided 0 comments. The rating is 5 out of 5 stars.

Specialties & Research

Dr. Ann Ouyang, BS, MBBS, MD is board certified in Internal Medicine and Gastroenterology.

  • She has special expertise in 7 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Esophageal Motility Disorders (Dysmotilities)
  • Gastroparesis
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Ouyang graduated from Guy's Hospital Medical School, London, England.


Dr. Ouyang has 1 hospital affiliations:

  • Milton S. Hershey Medical Center 

> > > > Dr. Ann Ouyang, BS, MBBS, MD

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Additional Information
Dr. Ann Ouyang BS, MBBS, and MD is a female Internist, has 37 years of experience and practices in Internal Medicine and Gastroenterology.
Where does Dr. Ann Ouyang practice?
Dr. Ann Ouyang has 1 office location.
Dr. Ann Ouyang practices Internal Medicine and Gastroenterology near Hershey, PA.
See Hershey Internists and Hershey Gastroenterologists.